Cas and Charlie swap bodies and mistaken identities result in new revelations.
There’s conflict in heaven. Michael is arguing that the children of earth are too favored by their father. That they have done nothing but cause war and strife, practically destroying the world God had carefully crafted for them. Another faction argues that mankind is still young. Yes, they are brash, but they will learn. There are signs of goodness that sprout up all around them. Michael argues these are tangible things only - too easy to destroy with the darkness that lies in every man. It is decided an emissary will be chosen to go down to earth. They must find some proof that humanity has good in it. Castiel is sent on a mission to find this proof. What he finds instead might end up being so much more.